			var provinceArr = ['上海市', '江苏省', '河北省'];
			var cityArr = [
				['上海市'],
				['苏州市', '南京市', '扬州市'],
				['石家庄', '秦皇岛', '张家口']
			];
			var countryArr = [
				[
					['黄浦区', '静安区', '长宁区', '浦东区']
				],
				[
					['虎丘区', '吴中区', '相城区','姑苏区', '吴江区'],
					['玄武区', '秦淮区', '建邺区','鼓楼区', '浦口区'],
					['广陵区', '江都区'],
				],
				[
					['长安区', '桥西区', '新华区', '井陉矿区'],
					['海港区', '山海关区', '北戴河区', '抚宁区'],
					['桥东区', '桥西区', '宣化区', '下花园区'],
				]
			];

			function createOption(obj, data) {
				for(var i in data) {
					var op = new Option(data[i], i);
					obj.Options.add(op);
				}
			}
			var province = document.getElementById('province');
			createProvince(province, provinceArr);

			var city = document.getElementById('city');
			province.onchange = function() {
				city.options.length = 0;
				createOption(city, cityArr[province.value]);
				if(province.value >= 0) {
					city.onchange();
				} else {
					country.options.length = 0
				}
			};

			var country = document.getElementById('country');
			city.onchange = function() {
				country.options.length = 0;
				createOption(country, countryArr[province.value][city.value]);
			}
 






